One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,7)(5,8)(6,11)(10,15)(12,14)(13,16)(17,18)(19,30)(20,35)(21,26)(22,28)(23,38)(24,27)(25,33)(29,36)(31,44)(32,42)(34,46)(37,40)(39,41)(43,48)(45,47) involution — undirected(1,3,5,11)(2,6,8,9)(4,12,13,10)(7,15,16,14)(17,19)(18,25)(20,31)(21,39)(22,33)(23,34)(24,32)(26,42)(27,41)(28,30)(29,43)(35,48)(36,44)(37,46)(38,45)(40,47)(17,20,36,28,24,37,40,27,22,29,35,18,21,38,23,26)(19,31,44,30,32,46,47,41,33,43,48,25,39,45,34,42)(1,4,5,13)(2,7,8,16)(3,10,11,12)(6,14,9,15)(17,21,22,24)(18,26,28,27)(19,32,33,39)(20,37,29,38)(23,35,40,36)(25,41,30,42)(31,45,43,46)(34,44,47,48)(2,8)(6,9)(7,16)(14,15)(17,21,22,24)(18,27,28,26)(19,32,33,39)(20,38,29,37)(23,35,40,36)(25,42,30,41)(31,46,43,45)(34,44,47,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.